Fuel feed



E. T. ADAMS.

FUEL FEED.

APPLICATION FILED MAY 24. 1918.

Patented Mar. 21, 1922.

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FUEL FEED. APPLl'cATloN man MAY24,1918.

Patented Mar. 21, 1922.

E. T. ADAMS.

FUEL FEED.

UNITED STATES PATENT OFFICE.

EDWARD T. ADAMS,

OF SYRACUSE, NEW YORK, ASIGNOR TO HUMPEREY GAS PUMP COMPANY, A CORPORATION OF NEW YORK.

FUEL FEED.

Specification of Letters Patent. l Patented Mar. 21., 192,2..

application med my 24, 191s. serial No.' 2se,375.

To all whom it may concern:

Be it known that I, EDWARD T. ADAMS, a citizen of the United States, residin at Syracuse, in the county of Onondaga, ltate o New York, have invented new ful Improvements in Fuel Feed, of which the following is a specification.

' My invention relates to improvements in liquid fuel feed for power cylinders. The object is to provide improved method and means for inJecting liquid fuel into a power cylinder having a reciprocating piston.

The invention comprises method and means for storing sufficient power durin one stroke of the piston, to operate the fue pump; for releasing this power to actuate the pump just as the piston comes to rest, or at a required point in the travel of the power piston; and to regulate or control the feed or delivery of fuel by the pump after thenpower is released.

e invention is especially applicable forl use in connection with the power cylinder of a reciprocating pump, especially a tube pump Without fly-wheel. 4

Referring to the `drawings, which illustrate, merely' by way of example, suitable means for effecting my invention- Fig. 1 is a plan view of mechanism for effecting my invention.

Fig. 2 is a section on line 2, 2 of Fig. 1.

Fig. 3 is' an end elevation. y

Fig. 4 is a sectional elevation of the right hand portion of the mechanism shown in 2, the parts in position towards the en of the compression stroke.

Similar numerals refer to similar parts throughout the several views.

The plunger 7 operates in the liner 8,

.fitted into the pump body 9, which is provided with the pump chamber 10 and the inlet valves 11 and discharge valve 12, permitting the intake and discharge to and from said chamber 10. This pump body is also provided with the nozzle l13 adapted to be connected with the supply of liquid fuel,

l and nozzle 14 discharging through suitable tubing, not shown, to the combustion or power chamber of thepump. The spring 15, acting between collar 16 and vthe pump body 9, tends to withdraw the plunger 7 from chamber 10. Plunger 7 is forced into the pump chamber 10 by the yoke 17 actuated by the more powerful spring 18, the outer end of which engages the collar 19 and useconnected to the pump bod 9, the inner end of which engages the collar 20 secured to the rods 21; which rods are securedto the yoke 17. The opposite ends of said rods bein connected to the slidin box 22 having s idjng engagement with 'ci 9, said box 22 having journalled therein the cam roller 24. The movement of the sliding box 22 tothe left, with rods 21 and yoke 17, causes the yoke to be withdrawn from the plunger head 25, and permits the plunge1f7 to be withdrawn from chamber 10 in response to the actuation of spring 15. When the parts are permitted to move in response to the actuating of the heavier spring 18 the plunger is forced into pump chamber 10.

The cam 26 is adapted to rotate on roller f bearings mounted on shaft 27. The Shaft 27 is mounted in the journalv bearing 28 and is provided with a worm gear 29 keyed thereto and cooperating with the worm 30 which is arbitrarily turned by any suitable means such for example as the hand-crank 31, to move the shaft 27 into desired rotative adjustment.

The lever 32 is loosely journalled at one end on shaft 27 and is connected near the other end by a connectin rod 33, with a reciprocating portion of t e pump, suchas a side rod 34 of the pumpen ine. A series of holes 35 are provlded at't e freeend of lever 32 for adjusting this connection, that is, adjusting the amount of actuation or throw communicated bythe said reciprocated part through connecting rod 33 to said leve-r 32.

A latch 36 is pivotally secured at 37 to lever 32, and adapted to engage the detent 38 of cam memberv 26. The rear end of latch lever 36 is connected to the spring 39, the other end of said spring being connected to a stud 40 on lever 32. The spring' 38 serves normally to maintain the latch 36 in engagement with the detent 38 until released by the mechanism now to be described.

A trip member 41 is clamped to shaft 27 and is adapted to trip the latch 38'at a required point in the downward movement of lever 32. The adjustment of this trip 41 e pump`body i clamping the bearings of shaft 27, by means of the bolts 42.

A rubber buffer 43 is provided to engage face 44 of cam member to arrest the counterclockwise movement of the said cam.

In operation, when the side rods of the pumping engine are raised, together with the power piston for startlng, the latch 36 hooks over the detent 38 of cam 26. Upon the down stroke of the (power piston the lever 32'movesl downwar ly, in the clockwise direction, pulling latch 36 and thereby rotating cam 26 in t e direction of the arrow in Fi 2.

It will ie understood that the cam roller 24 is always maintained in engagement with cam 26 by the pressure of spring 18. When cam 26 is rotated in the direction of the ar.- row it acts upon roller 24 further to comress s ring 18 and to move yoke 17 to the liaft, w ereby plunger 7 is withdrawn from chamber 10, as described, until the latch 1s disengaged from the cam by the trip 41, whereupon the cam is free to return to m1- tial position, in response to the pressure of spring 18 through roller 24 upon .sald cam 26, and consequently the plunger 1s moved into chamber 10.

As above stated the cam. is mounted on ball bearings, and will normally be returned to initial posltion, as shown in Fig. 2, due to the action of the spring pressed roller 24 on the inclined surface of cam 26 after release of the latch 36.

From this o eration it will be understood that by the own stroke or compression stroke of the power piston, plunger 7 is actuated to introduce liquid fuel into chamber 10 past valves 11. At or near the end of the compression stroke, as determined by the adjustment means above described, the cam is suddenly released by the trip 41 disengaging the latch 36. The spring 18 then actuates the plunger 7 to force liquid fuel from `chamber 10 past valve 12 to inject said fuel into the power cylinder. The return move-l ment of cam 26 controls the actuation of plunger 7 and consequently the injection of liquid fuel into the power cylinder, throughout the entire .delivery and during such period as may be desirable. Upon the power stroke which now follows, the upward movement of the power piston causes, in the manner described, th'e actuation of the latch 36 until the same engages the cam 26 from which point the cycle is repeated.

If the adjustment of the trip 41 is set so that the cam and spring are released much before the end of the com ression, fuel will be injected and will be urned nearl at constant volume, with the resulting liigh pressure of the Otto cycle. If the adjustment be set so that the latch 36 is not tripped until the very end of the compression stroke, the fuel will not be injected until the power piston has actually -started upward by the reaction. nearly constant pressure, as is common m This will produce burning at' the Diesel cycle. By adjustments in between these two extremes, variation in len th of compression stroke may be allowed or and the best conditions of burning to secure maximum power impulses, and complete combustion may be secured. The principle consists in storing energy during the first part of the compression stroke in the spring 18, which amount of energy is adjustable (the amount of fuel required is therefore also adjustable) by the ad'ustment as described of the throw of the lever 32, and this energy when released by the trip 41 at the proper instant, which is also adjustable, actuates the plunger to inject fuel at the ruroper time and in the proper uantity. his time and this quantity may(l e so adjusted to give burning either at constant volume or at constant pressure, or at the best combination of the two cycles.

What I claim is 1. The method of feeding fuel to an internal combustion engine, which consists in storing energy derived from the engine, sufficient to deliver the fuel, releasing said energy at an arbitrarily determined point with respect to the engine cycle, and opposing a restraining force to the released energy during the entire delivery in order to regulate the feed as required.

2. The method of feeding fuel to an internal combustion engine, which consists in storing a regulatable amount of energy de# rived from the engine, releasing said energy at a point determined with respect to the engine cycle, and opposing a restraining force to the released energy during the entire delivery in order to regulate the feed as required. j

3. The method of feeding fuel to an internal combustion engine, which consists in storing ener y derived from the engine, suflicient to eliver the fuel, releasing said energy at an arbitrarily determined point with respect to the engine cycle, and opposing a restraining force to the released energy during the entire delivery in order to regulate the feed so that the fuel will be delivered and burned .at nearly constant volume.'

4. The method of lfeeding fuel to an internal combustion engine, which consists in storing ener y derived from the engine, suiiicient to eliver the fuel, releasing said energy at an arbitrarily determined point with respect to the engine cycle, and opposing a restraining force to the released energy during the entire delivery in order to regulate the feed so that the-fuel will be delivered and burned at nearly constant pressure.

5. The method of feeding fuel to an internal combustion engine, which consists in storing energy derived from the engine, sufficient to deliver the fuel, releasing said energy at an arbitrarily determined point with respect to the engine cycle, and opposing a restraining force to the released energy during the entire delivery in order to regulate the feed so that the fuel will be delivered and burned under such conditions with respect to pressure and volume as may be required.

6. In combination with a fuel pump for internal combustion engines, means including a rotating element for storing energy derived from the engine, means for releasing said stored energy, at a point predetermined with respect to the engine cycle, to actuate said pump, and means utilizing the reverse movement of the rotating element for controlling said pump actuation in orA der to regulate the feed of fuel as required.

7. In combination with a fuel pump for internal cpmbustion engines, means including a camfor storing energy derived from the engine, means for releasing said stored energy, at a point predetermined with respect to the engine cycle, to actuate said pump, and means, comprising the cam in reverse movement, for regulating said pump actuation so that it shall deliver fuel to secure combustion under conditions respecting- 9. A fuel ump for a power cylinder com-- prising a p unger, a pump chamber provided with inlet and discharge valves, a spring for withdrawing the plungervfrom the chamber, a heavier spring for forcing the plunger toward the chamber, connecting means between springs andvplunger, means for counterbalancing or compressing the heavier spring to permit plunger actuation by the lighter spring andthen for suddenly releasing said spring counterbalancing, compressing means to permit the plunger actuation in opposite direction by the heavier spring, and means for retarding said last mentioned actuation. v

10. A fuel ump for `a power cylinder comprising a p unger, a pump chamber provided with inlet and discharge valves, a spring for withdrawing the plunger from the chamber, a heavier spring for forcing the plunger toward the chamber, connecting means between springs and plunger, means for .counterbalancing or compressing the heavier spring to permit plunger actuation by the lighter spring and then for suddenly releasing'said 'spring counterbalancing and compressing means to permit the plunger actuation in opposite direction by the heavier spring, comprising a cam, a rocking arm connected with the power piston, a latch connecting the arm with the cam, and a trip for disengaging the latch from the cam at the required point in the operation of the power piston.

1l. fuel pump for a power cylinder comprising a plunger, a pump chamber provided with inlet and discharge valves, a spring for withdrawing the plunger from the chamber, a heavier spring for forcing the plunger toward1 the chamber, connecting means between springs and plunger, means for counterbalancing or compressing the heavier spring to permit plunger actuation by the lighter spring and then for suddenly releasing said spring counterbalancing and compressing means to permit the plunger actuation in opposite direction by the heavier spring, comprising a cam, a rocking arm operatively connected with the power piston, means for adjusting the connection between the rocking arm and the power piston, for varying the throw of the rocking arm, a latch connecting the arm with the cam, and a trip for disengaging the latch from the cam at the required point in the operation of the power piston.

12. A fuel pump for a power cylinder comprising a plunger, a pump chamber provided with inlet and discharge valves, a spring for withdrawing the plunger from the chamber, a heavier spring for forcing 105 the plunger toward the chamber, connecting means between springs and plunger,'means for counterbalancing or compressing the heavier spring to permit plunger actuation by the lighter spring and then for suddenly 110 releasing said spring counterbalancing and compressing means to permit the plunger actuation in opposite direction by the heavier spring, comprising a cam, a rocking arm operatively connected with the power pis- 115 ton, a latch connecting the arm with the cam, and a trip for disengaging the latch from the cam at the required point in the operation of the power piston, and means for adjusting the trip to vary the point of 120 said disengagement.

18. A fuel pump. for a power cylinder comprising a plunger, a pump chamber provided with inlet and discharge valves, a spring for withdrawing the plunger fr om 125 the chamber, a heavier spring for forcing the plunger toward the chamber, connecting means between springs and plunger, means for counterbalancing or compressing the heavier spring to permit plunger actuation 130 from the cam at the required point in the operation of the power piston,l and means 10 for adlusting the trip to vary the point of said dlsengagement, the said cam after its release operatlng to retard the last named plunger actuation as required.

EDWARD T. ADAMS. 

